31444542 has 48 divisors (see below), whose sum is σ = 71705088. Its totient is φ = 9939600.

The previous prime is 31444541. The next prime is 31444547. The reversal of 31444542 is 24544413.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31444541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62263 + ... + 62765.

It is an arithmetic number, because the mean of its divisors is an integer number (1493856).

Almost surely, 2^31444542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31444542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35852544).

31444542 is an abundant number, since it is smaller than the sum of its proper divisors (40260546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31444542 is a wasteful number, since it uses less digits than its factorization.

31444542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 682 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 31444542 is about 5607.5433123606. The cubic root of 31444542 is about 315.6325309708.

Adding to 31444542 its reverse (24544413), we get a palindrome (55988955).

The spelling of 31444542 in words is "thirty-one million, four hundred forty-four thousand, five hundred forty-two".